Does a Python object which doesn't override comparison operators equals itself?

Question

class A(object):

    def __init__(self, value):
        self.value = value

x = A(1)
y = A(2)

q = [x, y]
q.remove(y)

I want to remove from the li

Answer 1

The answer is yes and no.

Consider the following example

>>> class A(object):
    def __init__(self, value):
        self.value = value        
>>> x = A(1)
>>> y = A(2)
>>> z = A(3)
>>> w = A(3)
>>> q = [x, y,z]
>>> id(y) #Second element in the list and y has the same reference
46167248
>>> id(q[1]) #Second element in the list and y has the same reference
46167248
>>> q.remove(y) #So it just compares the id and removes it
>>> q
[<__main__.A object at 0x02C19AB0>, <__main__.A object at 0x02C19B50>]
>>> q.remove(w) #Fails because though z and w contain the same value yet they are different object
Traceback (most recent call last):
  File "", line 1, in 
    q.remove(w)
ValueError: list.remove(x): x not in list 

It will remove from the list iff they are the same object. If they are different object with same value it won;t remove it.